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code 34 and 24 in 1988 vette

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Old 12-22-2005, 12:37 PM
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5speedC4
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Default code 34 and 24 in 1988 vette

well i get a code 34 - map sensor voltage low and maf sensor.....what does it mean?
i also get a code 24 - vehicle speed sensor, i swapped my 4+3 for a tremec 5 speed and havent got my speedometer going yet, i figure thats what the 24 is about.
Old 12-22-2005, 01:09 PM
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Morley
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Originally Posted by 5speedC4
well i get a code 34 - map sensor voltage low and maf sensor.....what does it mean?
It means that the voltage reading coming from the MAF sensor is not what the ECM is expecting to see from it, based on TPS, engine/vehicle speed and other parameters.
Old 12-22-2005, 02:01 PM
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Originally Posted by 5speedC4
well i get a code 34 - map sensor voltage low and maf sensor.....what does it mean?
It means you are working on the wrong car. Your 1988 Corvette doesn't even HAVE a MAP sensor. Additionally, it means to follow the trouble shooting charts in your factory service manual, for a code 34, to isolate, test, and cure the cause of the code being set.

RACE ON!!!
Old 12-22-2005, 03:12 PM
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AGENT 86
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http://members.shaw.ca/corvette86/Code%2034.pdf
http://members.shaw.ca/corvette86/Code%2024.pdf
Old 12-22-2005, 07:39 PM
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jackdaroofer
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Originally Posted by 5speedC4
well i get a code 34 - map sensor voltage low and maf sensor.....what does it mean?
i also get a code 24 - vehicle speed sensor, i swapped my 4+3 for a tremec 5 speed and havent got my speedometer going yet, i figure thats what the 24 is about.
Most common cause of 34 is faulty MAF relay(s)

On an 88 they are the pair mounted to the wheel well in front of the battery

One is the power relay and one is the burn off relay but according to THE GORDEN and first hand experience, replace tem both at the same time. Be sure, of course to clear the codes

seeya

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